favorite_place=['heaven','paradise','inferno','room','earth']
print(favorite_place)
print(sorted(favorite_place))
print(sorted(favorite_place))
favorite_place.reverse()
print(favorite_place)
favorite_place.reverse()
favorite_place.sort()
print(favorite_place)
print(favorite_place)
guests = ['A','B','C']
len(guests)
print(len(guests))
river=['chang river','yellow river','zhu river','lan cang river']
print(river[0])
river[0]='hei long river'
print(river)
river.append('da wen river')
print(river)
river.insert(2,'qi li river')
print(river)
del river[0]
print(river)
popped_river = river.pop()
print(river)
river=['chang river','yellow river','zhu river','lan cang river']
river.sort()
print(river)
print(sorted(river))
river.reverse()
print(river)
len(river)
print(len(river))